Using transcranial magnetic stimulation to quantify electrophysiological changes following concussive brain injury: A systematic review

Brendan P. Major, Mark A. Rogers, Alan J. Pearce

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Abstract

Mild traumatic brain injury (mTBI) and sports concussion are a growing public health concern, with increasing demands for more rigorous methods to quantify changes in the brain post-injury. Electrophysiology, and in particular, transcranial magnetic stimulation (TMS), have been demonstrated to provide prognostic value in a range of neurological conditions; however, no review has quantified the efficacy of TMS in mTBI/concussion. In the present study, we present a systematic review and critical evaluation of the scientific literature from 1990 to 2014 that has used TMS to investigate corticomotor excitability responses at short-term (< 12 months), medium-term (1-5 years), and long-term (> 5 years) post-mTBI/concussion. Thirteen studies met the selection criteria, with six studies presenting short-term changes, five studies presenting medium-term changes, and two studies presenting long-term changes. Irrespective of time post-concussion, change in intracortical inhibition was the most reported observation. Other findings included increased stimulation threshold, and slowed neurological conduction time. Although currently limited, the data suggest that TMS has prognostic value in detecting neurophysiological changes post-mTBI/concussion.

Original languageEnglish
Pages (from-to)394-405
Number of pages12
JournalClinical and Experimental Pharmacology and Physiology
Volume42
Issue number4
DOIs
Publication statusPublished - Apr 2015
Externally publishedYes

Keywords

  • Concussion
  • Evoked potential
  • Mild traumatic brain injury
  • Systematic review
  • Transcranial magnetic stimulation

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